[jira] [Comment Edited] (IGNITE-7530) .NET: Poor performance & excessive memory usage in GetAll and query cursors in binary mode

["Pavel Tupitsyn (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IGNITE-7530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16339149#comment-16339149 ] 

Pavel Tupitsyn edited comment on IGNITE-7530 at 1/25/18 12:22 PM:
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We should consider throwing an exception from {{PlatformMemoryStream.GetArray()}}, effectively enforcing detached mode for off-heap stream. This API is misleading.


was (Author: ptupitsyn):
We should consider throwing an exception from {{PlatformMemoryStream.GetArray()}}. This API is misleading.

> .NET: Poor performance & excessive memory usage in GetAll and query cursors in binary mode
> ------------------------------------------------------------------------------------------
>
>                 Key: IGNITE-7530
>                 URL: https://issues.apache.org/jira/browse/IGNITE-7530
>             Project: Ignite
>          Issue Type: Bug
>          Components: platforms
>            Reporter: Pavel Tupitsyn
>            Assignee: Pavel Tupitsyn
>            Priority: Major
>              Labels: .NET
>             Fix For: 2.5
>
>
> {{GetAll}} and query cursors do not use {{BinaryReader.DetachNext}}. So in binary mode for each binary object in a stream we copy entire stream content, see {{BinaryReader.ReadAsBinary}}, which calls {{Stream.GetArray()}}, which causes copying in {{PlatformMemoryStream}}.



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